Fhitei



F. s. HOVER.

DETECTOR FOB WIRELESS IELGRAPHY AND TELEPHONY- APPHCATIOII FILED DEC. H. "H- RENEWED FEB. 23. "I9.

1,318,277. Patented 0m. 7,1919.

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. Umran smiles ratrannoamcajl 13318277. I y i a mrimi r li e: um fifths minera eas wa ds, ployed in such apparatus, means being .y vided for adjusting the detector element of silver wire or the like, permitting the movement. thereof to any part of the surface of the mineral.

A further object is to provide means for inclosing the detector members, so that the latter will be free from dust and changing atmospheric conditions.

lVith the foregoing and other objects in view, the invention consists in the novel con struction, combination and arrangement of elements hereinafter described and claimed.

In the drawings:

Figure 1 is a longitudinal section of the device.

Fig. 2 is a transverse section on line 22 of Fig. 1.

A base portion of insulating material is designated 10 and mounted thereon are brackets 11 and 12 of any suitable metal the bindin posts being designated 13 and 14. A tubu ar member of glass is shown at 15, and means are provided for entirely inclosing and sealing the detector members within this lass c linder. One end of the cylinder is c osed y a body portion 16 of insulating material, this member being provided with a bore 17 through which the pin or bolt 18 extends, the latter having an outer threaded end engaged by a nut 19. A head 20 has soldered thereto a spring 21 which is in positive contact with mineral 22 mounted within a larger bore 23 formed within the body ortion of insulation and communicating with the bore first named. Mineral 22 is secured by any suitable substance shown at 24.

The opposite end of the glass tube is closed by means of a bod of insulation shown at 30 inclosin a meta lic cylinder 81 receiving a metallic anged head 44 having a bearing in bracket 12, said cylinder 31 carryin rigidly a flanged member 31' constituting a 's eumtamn of Lettersi meal.

{'Milil'ifil mil-ml i ewe t .Eebraary 28 1Bfl 9 HSpriaLHo. 279.1867.

ilgiw iil be ibitmssn l .irv gw aulaa nfl i url i Ffdlnh 'tri flnddil 1' ai iil fi di islig i' fi .esaa r imaa urs u tarl attlfl a; a mss rsr a; wash metallic ea .4 and, tai PFQYA aianrthasqrewfi le a lan. get-i9 a; ien'nuth sardines, was q aaa rtlm. a thasqmmbeweaanais e E a a as r are a ,2 a d harms a m r 5 :5 mar ed with. a m rlal' edge 5 at- H. slrli ai %viqimm atms itl s sarewefa moving the'plunger 36 longitudinally and llg l'tkyia liasting thenssition. fim nl 38min- M ing -thc silver wire detector element 40.

Screw 53 is retained by a nut 41, and a collar 42 bears against the opposite end of the plunger. The rod 38 passes through apertures in the head it, in the plunger 86, and in the head 45, these apertures being in alinement and eccentric with reference to the screw 33.

Rod 38 carries at one end thereof a knurled knob 47, and the rod is encircled by a spring 48 bearing against the head 45 and bearing against a collar 49 engaging the surface of the plunger 36. The end of the rod 38 is provided with an aperture ex tending transversely therethrough, for the purpose of mounting the element 40, and a screw 50 retaining said element in position.

In view of the construction described any point on the surface of the mineral may be engaged by the end of the detector element 40, the latter being mounted on a rod 38 as specified providing for movement in a curved path With reference to the main axis of the rotatable member.

What is claimed is:

1. In a device of the class described, a tubular member of insulating material, means for closing one end thereof and for mounting a mineral, and means for mounting a complementary detector member and comprising a device rotatable within the tubular member, and a rod eccentrically mounted within the rotatable device and supporting said detector member last named.

2. In a device of the class described a tubular member of insulating material, means for closing one end thereof and for mounting a mineral, means for connecting said mineral with a binding post or the like, means for mounting a complementary detector member and comprising a rotatable element mounted within the opposite end of the tubular member, said rotatable member being provided with a bore, a plunger operable Within said bore, means for operating the plunger, a rod extending through the plunger and located eceentrioally with reference to the main axis of the p unger, said rod carrying the eOmkpIementary 'detector member.

3. In a device of \the class described, a tubular member of insulating material, means 1 01 mounting a mineral element therein a complementary detector element, a bushing of insulating material mounted within one end of the tubular member, a rotatable tubular member mounted within the bushing means for operating said ro- *tata'ble mem er, a plunger 0 eratmg Within a bore in said rotatable member, a screw for controlling the position of the plunger, said plunger being provided with an eccentrilocated bore, a rod extending through calliy sai bore, and means carried by the rod for supporting the member.

4. In a device of the class described, a tubular member of insulating material, means for mounting a mineral therein, a bushing carried by one end of the tubular member and provided with a bore, a rotatable tubular member mounted within said bushing, a plunger Within the rotatable member, a screw for operatin the plunger, a rod passin through said pfimger and located eecentrlcally with reference to the axis thereof, a detector element carried by said rod, and cooperating with the mineral, a

complementary detector spring for controlling the position of the rod, said rod being manually adjustable against the tension of the spring.

In testimony whereof I aflix my signatmc.

FRED S. HUVER.

Copies of thll patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washin ton. D. O." 

